1. Vladimir Biočanin, Stomatoloski fakultet, Pančevo, Serbia 2. Nemanja Vuković, Department of Oral surgery, Faculty of Stomatology, Pančevo, Serbia 3. Marija Ćirić, Private practice, Belgrade, Serbia, Serbia 4. Veljko Ilic, 'Stomatoloski fakultet Univerzitet u Beogradu, Serbia 5. Đorđe Antonijević, Department of Anatomy, School of Dental medicine, Belgrade, Serbia, Serbia 6. Vukoman Jokanović , University of Belgrade, Vinča Institute of Nuclear Sciences, Serbia, Serbia